This is a fabulous item that everyone should own!
It's a galvanized metal circular container containing miniature glass test tubes that
are great for filling with short flower heads and bits of foliage.
When your bouquet of flowers needs to be cut shorter to get a few more days out of it, simply cut the stems and place into test tubes of water.
Alternatively, you could cut a few flower heads and sprigs of foliage from your garden!